Damper and air-regulator.



E. A. MIDGLEY. DAMPER AND AIR REGULATOR.

APPLICATION FILED MAY 23, 1908.

Patented Apr. 12,1910.

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UNITE STATES PTET Flo EPHRAIM A. lVIIDGLEY, OF SALT LAKE CITY, UTAH.

DAMPER AND AIR-REGULATOR.

To all whom it may concern:

Be it known that I, EPHRAIM A. MIDGLEY, a citizen of the United States, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Dampers and Air-Regulators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to furnaces for steam and water heating systems, and the objects of my invention are to furnish an improved damper attachment for furnaces and an improved means of regulating furnace dampers by attaching them to a float operating in a float chamber attached to the boiler of the system.

Also, another object of the invention is to attach the furnace and flue dampers, and also the valve in the air pipe, to a lever operated by a float.

I achieve these objects by the device illustrated in the accompanying drawing, in which- Numeral 1 designates a float operating vertically in a float chamber, preferably attached in a steam heating system. The float chamber may be six inches in diameter by 24 inches in depth, but the size is not especially material to the operation of the device. The float is connected to a lever 32 by a rod 3 passing through a stufling box 5, which rod 3 is attached to the lever at the pivot 6. The lever bar 32 is pivoted at 7 to a fulcrum attached to the chamber or to any firm structure that may give it the proper relative position. At one end of the lever a chain or other connection 21 attached to the end of the lever passes over pulleys 15 and 16 and is attached at 17 to the furnace damper 18. At the opposite end of the lever 32 a similar connection 20 passes over pulleys 13 and 1a to a flue damper 19. Attached to the lever bar 32 at 8 is a valve rod having at its extremity a valve 11 which operates to open and close the air pipe 12.

99 are counterweights adapted to slide upon the lever and be adjusted backward and forward and relatively to each other and to the weight carried and the pressure exerted by and on the bar. 22 is a return and air pipe from the system (not shown).

The operation of my device is as follows: On the rise of the water in the float cham- Specification of Letters Patent.

Application filed May 23, 1908.

Patented Apr. 12, 1910.

Serial No. 434,667.

ber, governed by the water level in the boiler (not shown) the float is lifted and falls again with the lowering of the water. As the float rises the float lever bar 32 pivots at 7 and lifts at one end, thus slackening the chain or other connection 21 and closing the damper 18. By the same action the lift of the float depresses the opposite end of the lever bar 32 pressing downward on the connection 20 which opens the flue damper 19. It will be seen that when the float is down the damper of the furnace is open and the flue damper is closed, both to advance the heating, and conversely, when the float is up the furnace damper is closed and the flue damper is open, both to check the fire.

The column of water in the float chamber is controlled by the water in the boiler, as shown in my previous invention, described in my application for patent for low pressure steam regulators, filed June 18, 1907, Serial No. 379,551. The function of the counterweights 99 is to allow the adjustment of the several parts so that they may be balanced evenly in the operation of the apparatus.

It is apparent that the float and valve can be operated without the attachment of the dampers, and that the dampers can be operated by the float without the attachment to the valve and that either one or both dampers can be operated at will.

In this device I place the valve to the air pipe and also the lever, outside of the float chamber instead of within that chamber, as illustrated in the aforesaid patent application.

The function of the air pipe is to conduct the air from steam coils and radiators in advance of the steam. It is well known that this is a difficult matter to accomplish. The function of the valve is to close after the air from the system has been driven out by the steam.

WVhat I claim and desire to secure by Letters Patent is:

The combination with a flue and a furnace damper, of a closed casing having a chamber formed therein, a pivotal support carried by the casing, a lever pivotally mounted upon the support, a float arranged within the casing and connected with the pivoted lever, means adapted to discharge a liquid into the casing beneath the float for moving the same, an air pipe leading from the cas ing above the float, a return air pipe leading to the casing above the float, the air pipe I connected with the flue damper whereby leading from the casing having a valve posiupon movement of the float in the casing the tioned therein, a rod connected with the furnace damper, the flue damper and the 15 valve and extending upwardly and convalve in the air pipe are made to automatic- 5 nected with the lever, and adapted to open ally open and close.

and close the valve for the purpose of open- In testimony whereof I aflix my signature ing and closing the pipe, a flexible meinin presence of two Witnesses. ber having one end secured to one end EPHRAIM A MIDGLEY of the lever, and the other end connected 10 With the furnace damper, a second flexible "Witnesses:

member having one end secured to the other f S. P. SNELL, end of the lever and having its other end J. A. MIDGLEY. 

